11.24: Two wave pulses travel to the right/zx8b ) 4qeyio toward a rigid boundary as shown. Afterz xe/qyoi84b) reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes thro lff;(uo 4wp:fugh the air and strikes the surface of a plastic block. Whi(:fwfu; 4ol fpch pair of statements correctly describes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight downward through th kevsc:b, *v-l,kmh1ye point labeled B in the diagram shown. The ray reaches a flat mirroly: 1vh -kcbes ,m,*kvr placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenevus p*:l.q7ne ser light is incident on

  05.18: A student hold a hand mirror to observe the back og 92/qlk+ cmcjf her head while standing in front of and looking into a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds tml/c+g ck j29qhe hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed thatfs/(v ,f+/c7yhaqj)ecl cf 7l a light ray changes direction when it enters a new material. Which one of the foy7 s/lq ) v ceffc/f(+,lha7jcllowing choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelengte8*o,snr wblbbq 3/ou( hn+,fh 400 nm in a transparent material. What is the index of refraction of the mateb fe u3,wqbo8r +h(n, *osb/lnrial?

  98.04: As sound travels fro.v0q 5zmop(f am steel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with a different inxwv+s ;: axh.qdex of refractionx s.q;x+:hwva which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuni -:x4 bkb)jdr 5p6njogng fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequ)on pbjxjb45 d6: gkr-ency of the sound as it passes from air to rock?

  14.28: A waterproof sywuj6 qjy/6;cpeaker placed at the bottom of a swimming pool emits a sound wave that travelwy/c6 jj6u; qys toward the surface of the water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white light strikes a rectangular glass block with an/ sjtw. p3 ckq9/) rfe05dhy/aq9umw; d1 vqfc angle of incidence 0cw arhudjecqq /f5 ;km/tdvq/1)sw3 ypf.99 of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P on a boundary as+ ok8xvi 4onz( shown to the right. Which segment best represen(noo vx+i4z8 kts the refracted ray?

  98.17: Which diagram best represents +0fc qlc +f bz) ,s67mqrvhh0bwhat happens to a ray of light entering air from water? Air is at the0 ,rqbcq0l f b)fv+7m+sh czh6 top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for qg /v3t+ww / iwozz0/cwhich the angle of refractioqtwz i 0cw//3ow+ /gzvn is:

  95.12: The principle underlying fiber ou7 3 3lfikiqh1ptics is:

  98.36: The critical angle qa8/pb0:ggjn in a transparent substance surrounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from mayb sf z 2,m:l9a3lpyglg8; kq0terial X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in matmbagpf 32:yl,qs89g l zy lk0;erial Y is v, what is the speed of light in material X?

  03.15: A jeweler can distinguish between a diamond and a piece of glass by wg y7z7vxr9*iexv -(;r va4f bobserving the critical angle of the light in each material. Glass with an index of reff(b zx iv vw-re49* ;gay7v7xrraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a clear material. When the light makes an oq4df *akv4d)ar2 xdke2 )w: xangle of incidence exvdd dk:ae 4x*2aq24ok )f wr)qual to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic la0a0t ; )xm uo7ekllxv4ser is embedded in a material of index of refraction n. The lase0m)47e0tlokua vlx;x r beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 tf86j-hvo czq helu ,;xe9;+z so medium 3 as shown in the accompanying figure. What is true about thhxj6 zls -z8oqf+cv9 e;euh;,e respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium3hx 1idod:2,y n,cf8.k culnlqk 93hf 3 as shown in the diagram. What may be conccllkq y., 9xk ndhuhfd2n3oi 3fc8,1:luded about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray t. t .;eqv:*(0gjxqtoczw va(makes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectivq;ve cq(xzj. m:vt0og t.w(a* ely. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below shows the path taken by a monochromatic light rab/zf; y,t9mcmuq;ij * 0;mivdy traveling t ymm*ij fmdv0t; b9ui;;,czq/hrough three media.The symbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light tr*chu v(dt5*jw aveling in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a 5zn 3l/b1 ebl 8wej8z1 hypr(irectangular block of glass at an angle or1ye3lnb1w(/ 8l 5zz8ihjebpf $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from airlw c.;ye -0,gvy lsbr3 into a piece of glass. Which one of the labeled arrows best indicates the -.c lgl0ybs ver w;,y3path of the light ray after it enters the glass?

  14.44: A ray of monochr 6j)ybxty.0m,cbq iq1omatic light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one6)b0jx ct iy.1,y qbqm of the lettered rays shows the path of the light after it exits the glass?